Abstract

The magnetic properties and magnetocaloric effect in antiferromagneticsuperconductorcompound have been studied. The magnetic phase transition occurs above the superconducting transition temperature . A giant reversible magnetocaloric effect has been observed, which is related to a field-induced first order metamagnetic transition from antiferromagnetic to ferromagnetic state. The values of maximum magnetic entropy change reach 14.7 and for the field change of 5 and 7 T with no obvious hysteresis loss around 13 K, respectively. These results indicated that could be a promising candidate for magnetic refrigeration at low temperatures.